DEVELOPMENT OF UNSTEADY INDOOR CONTAMINANT CONCENTRATION DISTRIBUTIONS FOR RISK ASSESSMENT OF HIGH CONCENTRATION AND SHORT-TERM EXPOSURE (PART 2): PREDICTION OF RESPIRATORY EXPOSURE CONCENTRATION ASSUMING INDOOR LIQUID CHEMICAL LEAKAGE

Recently, health risk assessment of chemical substances has become a legal requirement, and accordingly, estimation of indoor gas concentrations and their impact on workers has taken on increasing importance. Therefore, we have developed a numerical model based on CFD (Computational Fluid Dynamics) methods to predict transient and non-uniform concentration distributions for chemical substances in enclosed spaces. This paper (Part 2) reports on the heterogeneous concentration distributions of ethanol and aqueous ammonia solutions formed in a full-scale environment, the microclimate around the human body, and the risk assessment of trans-airway exposure.